/*
 * Tencent is pleased to support the open source community by making BK-CI 蓝鲸持续集成平台 available.
 *
 * Copyright (C) 2022 THL A29 Limited, a Tencent company.  All rights reserved.
 *
 * BK-CI 蓝鲸持续集成平台 is licensed under the MIT license.
 *
 * A copy of the MIT License is included in this file.
 *
 *
 * Terms of the MIT License:
 * ---------------------------------------------------
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of
 * the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
 * LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
 * NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

package com.tencent.bkrepo.oci.pojo.digest

import com.tencent.bkrepo.common.api.constant.CharPool
import com.tencent.bkrepo.common.api.constant.StringPool
import org.apache.commons.lang3.StringUtils

/**
 * OCI digest
 */
data class OciDigest(val digest: String? = null) {
    var alg: String = StringPool.EMPTY
    var hex: String = StringPool.EMPTY

    init {
        digest?.let {
            val sepIndex = StringUtils.indexOf(digest, CharPool.COLON.toInt())
            require(sepIndex >= 0) { "could not find ':' in digest: $digest" }
            this.alg = StringUtils.substring(digest, 0, sepIndex)
            this.hex = StringUtils.substring(digest, sepIndex + 1)
        }
    }

    fun fileName(): String {
        return this.alg + "__" + this.hex
    }

    fun getDigestAlg(): String {
        return this.alg
    }

    fun getDigestHex(): String {
        return this.hex
    }

    override fun toString(): String {
        return this.alg + ":" + this.hex
    }

    companion object {

        fun fromSha256(sha256: String): OciDigest {
            return OciDigest("sha256:$sha256")
        }

        fun isValid(reference: String): Boolean {
            if (reference.isEmpty()) return false
            val sepIndex = StringUtils.indexOf(reference, ":")
            if (sepIndex >= 0) return true
            return false
        }
    }
}
